import turtle
myPen=turtle.Pen()
myPen.speed()
#myPen.dot(10)
#myPen.forward(100)#(100,0)
#myPen.range(8)
myPen.goto(100,0)
myPen.dot()
myPen.goto(100,100)
myPen.dot()
myPen.goto(0,100)
myPen.dot()
myPen.goto(0,0)
myPen.dot()
myPen.goto(-100,0)
myPen.dot()
myPen.goto(-100,-100)
myPen.dot()
myPen.goto(0,-100)
myPen.dot()
myPen.goto(0,0)